What does "type safety" mean in programming?
type safety is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
A property of a language or program that prevents type errors by ensuring operations are only applied to compatible types. Statically typed languages like TypeScript enforce type safety at compile time; dynamically typed languages like JavaScript check at runtime (if at all).
Example
"// TypeScript catches this at compile time: const n: number = 'hello'; // Error: Type 'string' is not assignable to type 'number'"
Related terms
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